S
- (Province of Bulacan) Sipat
- (Province of Pampanga) Sinura
- (Province of Tarlac) Sinulatan Second
- (Province of Tarlac) Sinulatan First
- (Province of Tarlac) Sinolatan
- (Province of Nueva Ecija) Sinipit Bubon
- (Province of Tarlac) Sinipit
- (Province of Nueva Ecija) Sinipit
- (Province of Tarlac) Sinilian Third
- (Province of Tarlac) Sinilian Second
- (Province of Tarlac) Sinigpit
- (Province of Tarlac) Singat
- (Province of Zambales) Sindol
- (Province of Pampanga) Sindalan
- (Province of Nueva Ecija) Sinasajan
- (Province of Zambales) Sinambuangan
- (Province of Zambales) Sinabacan
- (Province of Nueva Ecija) Sinaaban
- (Province of Zambales) Simminoblan
- (Province of Bulacan) Simarran
- (Province of Bulacan) Simaron
- (Province of Bulacan) Silonay Island
- (Province of Bulacan) Silonay
- (Province of Bulacan) Siling Matanda
- (Province of Bulacan) Siling Bata
- (Province of Zambales) Silanguin Island
- (Province of Zambales) Silanguin
- (Province of Nueva Ecija) Sisikan
- (Province of Bulacan) Sidsiran
- (Province of Bulacan) Sicaw